Precipitation in 9Cr-1Mo steel after creep deformation

被引：41
|
作者：
Furtado, H. C.
de Almeida, L. H.
Le May, I.
机构：
[1] Met Consulting Serv, Saskatoon, SK S7K 4E3, Canada
[2] Ctr Pesquisas Energia Eletr, CEPEL, BR-21941590 Rio De Janeiro, Brazil
[3] URFJ, COPPE, PEMM, BR-21941972 Rio De Janeiro, Brazil
来源：
MATERIALS CHARACTERIZATION | 2007年 / 58卷 / 01期
关键词：
Cr-Mo steel; carbides; precipitation; creep;
D O I：
10.1016/j.matchar.2006.04.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The carbides present after creep testing a 9Cr-1Mo steel at 566 degrees C over a range of stress levels giving rupture times of up to 7300 h have been characterized and identified using a transmission electron microscopy, energy-dispersive X-ray spectroscopy and electron diffraction. The initial carbide precipitates present were W7C3, (NbV)C and VC and it was determined that M6C carbide precipitates were present in all specimens after elevated temperature exposure for greater than approximately 1700 h. No precipitation Of M23C6 was detected. The evolutionary sequence from the initially present carbides during high temperature exposure involved the formation of the stable M6C carbide directly, without the intermediate formation of M23C6, as is reported to occur in other Cr-Mo steels. (c) 2006 Elsevier Inc. All rights reserved.
引用
收藏
页码：72 / 77
页数：6
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